Bio-Botanica, Inc. Cat’s Claw Bark In Butylene Glycol is a product from the Rubiaceae plant family, with the Latin name Uncaria tomentosa. Its key chemical constituents include oxindole alkaloids, indole alkaloidal glucosides, quinovic acid glycosides, tannins, polyphenols, catechins, and beta-sitosterol. This product serves the functional categories of immune support, bone and joint support, and digestive support.